Graco 8482 Owner's Manual page 30

A manually adjusted lap belt
by pulling on the excess belt while pushing
down hard on the car seat. However, you may
have trouble tightening the belt because of the
upright angle at which you must pull. You may
have to unbuckle the vehicle belt, estimate a
belt length that will make the vehicle belt very
tight, then buckle it again.
9. Tightening a lap/shoulder combination belt:
A lap/shoulder combination belt with a
locking latchplate
hard on the shoulder portion of the vehicle
belt while pushing down hard on the car seat.
However, you may have trouble tightening
the belt because of the upright angle at which
you must pull. You may have to unbuckle the
vehicle belt, estimate a belt length that will
make the vehicle belt very tight, then buckle
it again.
is tightened by pulling
30
is tightened